package org.base.oj.config;

import org.base.oj.filter.TokenFilter;
import org.base.oj.service.impl.UserMD5PasswordEncoder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.web.access.AccessDeniedHandler;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

@Configuration
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private TokenFilter tokenFilter;
    @Autowired
    private AccessDeniedHandler accessDeniedHandler;

    //配置密码加密方式
    @Bean
    public PasswordEncoder passwordEncoder() {
        return new UserMD5PasswordEncoder();
    }

    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
                //关闭csrf
                .csrf().disable()
                //不通过Session获取SecurityContext
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                .and()
                .authorizeRequests()
                // 对于登录接口 允许匿名访问
                .antMatchers("/user/login").anonymous()
                .antMatchers("/user/register").anonymous()
                // 除上面外的所有请求全部需要鉴权认证
                .anyRequest().authenticated();
        //添加token过滤器在UsernamePasswordAuthenticationFilter之前
        http.addFilterBefore(tokenFilter, UsernamePasswordAuthenticationFilter.class);
        //配置授权异常处理器
        http.exceptionHandling().accessDeniedHandler(accessDeniedHandler);
        //允许跨域
        http.cors();
    }
}
